[#SRP_Calc_u]
= SRP_Calc_u
:mrdocs:

Compute the SRP scrambling parameter u = H(A, B) using the default library context (deprecated).

== Synopsis

Declared in `<openssl/srp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
xref:BIGNUM.adoc[BIGNUM]*
SRP_Calc_u(
    xref:BIGNUM.adoc[BIGNUM] const* A,
    xref:BIGNUM.adoc[BIGNUM] const* B,
    xref:BIGNUM.adoc[BIGNUM] const* N);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

Newly allocated u value, or NULL on error; free with BN_free().

== Parameters

[cols="1,4"]
|===
| Name| Description
| *A*
| Client public value.
| *B*
| Server public value.
| *N*
| Safe prime modulus (used when hashing A and B as padded fields).
|===


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